Olympus Zuiko 100 f2.8 or 85 f2?

I'm looking for a short telephoto for my OM system. I like the look of the 85mm f2, but the few I've seen are very pricey. The 100 f2.8 is much more affordable and there seem to be more around. Anyone have experience of either or both of these lenses? Should I go for a 100 or is it worth waiting for a 85 (assuming I can afford it?